williams



3 Sheets-Sheet 1 (No Model.)

. J. H. WILLIAMS.

GHAIN WRENCH.

No. 377,795. Patented Feb. 14, 1888.

r FL 3 SheefisSheet 2.

(No Model.)

J. H. WILLIAMS.

CHAIN WRENCH.

Patented Feb. 14,1888.

qQLE 4 w mammal) I a SheetQ-Sheet a.

H. WILLIAMS.

CHAIN WRENCH.

No. 377,795. Patented Feb '14, 1888..

5 JL n D V T W 1.

NITED STATES PATENT OFFICE.

JAMES H. WILLIAMS, OF BROOKLYN, NEW YORK.

CHAIN-.WRENCH.

SPECIFICATION forming part of Letters Patent No. 377,795, dated February14, 1888.-

Application filed May 23, 1887. Serial No. 239,035. (No model.)

To all whom, it may concern.-

Be it known that I, JAMES H. WILLIAMS, a citizen of the United States,residing at Brooklyn,county of Kings, and State of New York, haveinvented certain new and useful Improvements in Ohain wrenches, fullydescribed and represented in the following specification and ofa portionof Fig. 1.

, the accompanying drawings, forming a part of the same.

Thisinvention relates to a chain-pipe wrench of the same generalconstruction as that shown and described in United States Letters PatentNos. 254,862 and 298,242. 7

The invention consists in certain details in the construction of partsof the wrench,

In order to give a full understanding of the invention, it will benecessary to describe the various improvements in detail, which will nowbe done, reference being had to the accompanying drawings, in which-Figure l is a side view of a chain-wrench of the same generalconstruction as that shown in the Letters Patent referred to, but alsocontaining the improvements constituting the present invention. Fig. 2is an enlarged view Fig. 3 is an edge view of the wrench, looking fromthe right of Figs. 1 and 2. Fig. 4 is a section taken on the line 4 4 ofFig. 2. Figs. 5 and 6 are cross-sections taken, respectively, on thelines 5 5 and 6 6 of Fig. 2. Fig. 7 is asectional view showing one ofthe jaw-plates removed and the chain in the position it will occupy whenthe wrench is in use. Fig. 8 is an edge view looking from the right ofFig. 7, both jaw -plates being shown. Fig. 9 is an edge view lookingfrom the leftof Fig. 2. Fig. 10 is a view similar to Fig. 3,illustrating a slight modification, which will be hereinafter referredto. Fig.

11 is a side view of the same, one of the jaws plates being removed; andFig. 12 is a view similar to Fig. 1, illustrating another modification.

of substantially the same general construction as that shown in theLetters Patent before referred to, consists of a handle, A, provided atits end with two jaw-plates, B, arranged upon the opposite sides of thehandle and extending beyond its end, and a chain, 0, having one endsecured permanently between the jaws at' one side of the handle, andarranged to encirclethe pipe which is to be operated upon,and have itsopposite end secured temporarily between the jaws upon the opposite sideof the handle. The jaw-plates B, which are of halfoval form and providedupon their edges with teeth b, are secured to asquare head, a, formedupon the end of the handle by means ofscrews 2.

The jaws B are provided upon their inner faces with channels 8, thesides of which form shoulders 3, which fit against the sides of the heada, so as to secure thejaws rigidly to the handle and remove the strainfrom the screws 2.

The chain 0 is composed of links a, which are secured together by pins4, which pass, through the links in the usual manner. One end of thechain is secured between the jaws B on one side of the handle in amanner that will presently be explained. The pins 4 at the opposite endof the chain and for a considerable portion of its length extend beyondthe links 0, so as to form projecting studs, as shown in Figs. 3 and 4,and the jaws are provided upon the opposite side of the handle withshoulders 7, which are adapted to engage with the projecting pins 4, soas to secure the free the handle A in the direction indicatedvbyithei'arrow in" Fig. 7 the teeth I) will engage with the pipe, so that thewrench will be eiiective. The length of the chain G will be snfficientso as to adapt the wrench to operate upon pipes which vary considerablyin size.

The jaws B are provided upon both their faces with recesses 8, toreceive the head a of the handle, and with the shoulders 7, to engagewiththe pins 4. By reason of this construction it becomes possible, bysimply removing the screw 2, to reverse either one of the jaws, so as tocause the teeth 1) upon either edge of the jaw to coact with the teethupon either edge of the other jaw, and thus make the wrench availablefor use as long as the teeth upon one edge of each jaw are in goodcondition.

In the construction shown in the Letters Patent referred to and in thewrenches heretofore in use the end of the chainwhich was attachedpermanently to the jaws was secured in that position simply by a pin, 5,which passed through openings6in thejaws and through the links of thechain, so as to take the place of one of thepins 4. This made theconnections at the two ends of the chain unequal in strength, the twopins 4 at the free end of the chain, which ab'utted against theshoulders 7, being much stronger than the one pin 5 at the opposite end,and this where the wrench was subjected to heavy strain was of course adisadvantage. To cure this defect Iprovide the end of the chain which isto be permanently connected to the jaws witha special link having thehead (1, which fits between the jaws, so as to abut against theshoulders 7, the head (1 being held in that position between thejaws bymeans of short pins or studs 9, formed on its sides, which enterrecesses 1, formed in the sides of the jaws. This constitutes a verystrong connection between the chain and the jaws at that end, and yetpermits the chain to be reversed at any time desired by simply removingone of the jaws. This manner of connecting the chain to the jawsconstitutes another feature of the invention. This form of connectionmay be omitted and the special link at the end of the chain be providedwith two heads, d e, which abut against both of the shoulders 7 of thejaw, as shown in Figs. 10 and 11.

If it should be desired to give still greater durability to the wrench,the plates B may be made doublethat is, each provided with four of thetoothed edges b, as shown in Fig. 12. In this case the jaw-plates can bereversed by turning them end for end as well as side for side. This formwill usually not be preferable, however, because of the added weight itgives to the wrench. I

What I claim is-- 1. In a ehain-wrench, the eombination,with the handleA, of the jaws B, each having four of the toothed edges b and madeseparately reversible by turning them end for end and side for side,substantially as described.

2. In a chain-wrench the combination,with the handle A and the jaws B,having the shoulders 7, of the chain 0, having a link at one endprovided with the head to engage with the shoulders 7, substantially asdescribed.

3. In a chain-wrench, the combination, with the handle A and thejaws B,having the shoulders 7 and recesses 1, of the chain 0, having the head dand projecting pins Q, substantially as described.

4. In a chain-wrench, the eombination,with the handle A and the jaws B,having the shoulders 7 and recesses 1, of the chain 0, having thespecial link provided with the heads (I e and pins 9, to engage with theshoulders 7, substantially as described.

In testimony whereof I have hereunto set my hand in the presence of twosubscribing witnesscs.

JAMES H. WILLIAMS. Witnesses:

GEORGE H. Bor'rs, J. J. KENNEDY.

